--- title: How to fix decimals arithmetic in JavaScript | daily.dev description: If you try to do the sum of two decimal numbers in JavaScript you might have a surprise. The reason is due to the fact computers store data as binary, 0 or 1.... canonical: https://daily.dev/posts/how-to-fix-decimals-arithmetic-in-javascript-2kkv-zr0n twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How to fix decimals arithmetic in JavaScript | daily.dev og:description: If you try to do the sum of two decimal numbers in JavaScript you might have a surprise. The reason is due to the fact computers store data as binary, 0 or 1.... og:url: https://daily.dev/posts/how-to-fix-decimals-arithmetic-in-javascript-2kkv-zr0n og:image: https://api.daily.dev/og/posts/2KkV_zR0n.png og:image:alt: How to fix decimals arithmetic in JavaScript og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # How to fix decimals arithmetic in JavaScript **[Flavio Copes](https://daily.dev/sources/flaviocopes)** · 2 min read · 10 upvotes · 1 comments ## Summary If you try to do the sum of two decimal numbers in JavaScript you might have a surprise. The reason is due to the fact computers store data as binary, 0 or 1. Not every decimal number can be represented perfectly in this binary format. Some numbers are repeating numbers in binary. Try to convert 0.1 from decimal to binary. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@\_fotinovski16925728762628446434127172** · 0 upvotes > Thanks, Flavio! > This one helped me a lot 🙌 ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments --- Tags: [#javascript](https://daily.dev/tags/javascript) [View this post on daily.dev](https://daily.dev/posts/how-to-fix-decimals-arithmetic-in-javascript-2kkv-zr0n) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"How to fix decimals arithmetic in JavaScript","url":"https://daily.dev/posts/how-to-fix-decimals-arithmetic-in-javascript-2kkv-zr0n","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-to-fix-decimals-arithmetic-in-javascript-2kkv-zr0n"},"datePublished":"2022-04-25T06:11:40.185Z","dateModified":"2022-04-25T06:11:40.185Z","description":"If you try to do the sum of two decimal numbers in JavaScript you might have a surprise. 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